# NexusAPI Crypto Transaction Trace

> NexusAPI Crypto Transaction Trace is a paid API for AI agents from nexus-api-peach-nine.vercel.app, paid per call via x402, $0.078241/call, status unknown (last checked 2026-09-13).

Traces a cryptocurrency transaction to reveal its full execution path, internal calls, and state changes on-chain

## Facts

- Endpoint: POST https://nexus-api-peach-nine.vercel.app/api/crypto/transaction/trace
- Price: $0.078241/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-crypto-transaction-trace-4cdc0df5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NpC0xDcz04QOwMcRzi_nz

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability nexusapi-crypto-transaction-trace-4cdc0df5 -d '<json body>'
```

Example prompt: Can you trace this transaction and show me all the internal calls and what happened step by step: 0x4e3a3754410177e6937ef1f84bba68ea139e8d1ad6d616ffd7c3f7bfd15a20d2?

## When to prefer this

Use this endpoint when you need to deeply inspect the internal execution of a blockchain transaction — especially for debugging failed smart contract calls, auditing token transfers, or investigating complex DeFi interactions. Prefer this over simple transaction lookup endpoints when you need the full call trace rather than just top-level transaction metadata.

## Known failure modes

- Invalid or malformed transaction hash returns 400 error
- Transaction not found on supported chains returns empty or 404 response
- Network timeout for very complex transactions with deep call stacks
- Unsupported blockchain network returns error
- Rate limiting or payment failure returns 402

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns a detailed trace of the specified blockchain transaction, including internal call stack, sub-calls, value transfers, state changes, execution steps, and any revert reasons if the transaction failed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexusapi-crypto-transaction-trace-4cdc0df5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-api-peach-nine.vercel.app](https://www.zero.xyz/host/nexus-api-peach-nine.vercel.app/llms.txt)